NN → NNπ at intermediate energies: Predictions of a unitary model

We explore the NN → NNπ reaction in detail within the context of a unified model which satisfies two- and three-body unitary. Predictions for differential cross sections and spin observables are examined and compared with experimental data, where available, for a variety of exclusive [pp → p(n)π⁺, pp → pp(π⁰), and np → p(p)π^-] and inclusive [pp → p(X) and pp → n(X)] reactions. Based on predictions of the model, further experiments are suggested to shed additional light on the NN → NNπ process. Due to dynamical symmetries the np → p(p)π^- observables are strikingly different from the more familiar pp → p(n)π⁺ observables, and we urge that this reaction be investigated experimentally. Experimental tests for the existence of dibaryons are also briefly discussed.